Abstract

The objective of this study was to cytogenetically analyze Phractocephalus hemioliopterus comparing the findings with other data to infer relationships among Pimelodidae species. The results revealed a diploid number of 2n = 56 and the karyotype composed of 16 metacentric, 20 submetacentric, 6 subtelocentric and 14 acrocentric chromosomes (FN = 98). The Ag-NORs, 18S rDNA and CMA3 signals were coincident in location occupying the short arm of an acrocentric chromosome pair (23th), in a secondary constriction. The 5S rDNA genes were localized near the centromere on the short arms of one submetacentric chromosome pair. C-bands were localized predominantly in the terminal regions of chromosomes, including the AgNORs and a small metacentric pair with a conspicuous positive band on interstitial region. This chromosome pair could be considered a species-specific cytogenetic marker.

Addeddate

2025-03-16 15:33:10

Bhl_virtual_titleid

210879

Bhl_virtual_volume

v.11:no.1 (2017)

Call number

10_3897_CompCytogen_v11i1_11152

Call-number

10_3897_CompCytogen_v11i1_11152

Foldoutcount

0

Genre

article

Identifier

cytogeneticstud11swar

Identifier-ark

ark:/13960/s26c57fznk3

Identifier-bib

10_3897_CompCytogen_v11i1_11152

Identifier-doi

10.3897/CompCytogen.v11i1.11152

Issue

1

Ocr

tesseract 5.3.0-6-g76ae

Ocr_detected_lang

en

Ocr_detected_lang_conf

1.0000

Ocr_detected_script

Latin

Ocr_detected_script_conf

1.0000

Ocr_module_version

0.0.21

Ocr_parameters

-l eng

Page_number_confidence

78

Page_number_module_version

1.0.5

Page_range

119-128

Pages

10

Pdf_degraded

invalid-jp2-headers

Pdf_module_version

0.0.25

Possible copyright status

In copyright. Digitized with the permission of the rights holder.

Ppi

300

Source

Comparative Cytogenetics 11(1)

Year

2017

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